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A comment on Randomize your WiFi MAC address on Ubuntu. Parent comment

Re:Randomize your WiFi MAC address on Ubuntu by rurban on Sunday December 03, 2017 @04:29PM (#15839700) 

    new_mac=$(openssl rand -hex 4 | sed 's/\(..\)/\1:/g; s/:$//; s/./0/2'; s/^/02:/)
is better. by using the 02: prefix for locally administered macs you avoid clashes with certain cards. I also used to randomize my local hostname.
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Re:Randomize your WiFi MAC address on Ubuntu by throwmenow_0140 on Sunday December 03, 2017 @07:32PM (#15840576)
Most of the time there are <100 devices connected to the wifis I'm connected to. I don't want to do the math now, but I expect that a collision is pretty unlikely. If you mean that some cards have problems with handling those mac addresses, I would love to hear about that.

> I also used to randomize my local hostname

Great idea, missed that. I'll integrate that in the future.

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Re:Randomize your WiFi MAC address on Ubuntu by rurban on Monday December 04, 2017 @03:54PM (#15847395)
Intel cards and Realtek cards are known to be problematic with random vendor prefixes.
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